Device for cutting weft threads of woven fabrics



R. MARX DEVI-CE FOR CUTTING WEFT THREADS 0F WOVEN FABRICS Feb. I4, 1928.

Filed March 25. 1925 2 Sheets-Sheet 1 R. MARX DEVICE FOR CUTTING WEFT THREADS OF WOVEN FABRICS Filed March 25, 1925 2 Sheets-Sheet 2 Patented Feb. 14, 1928.

. UNITED" STATES RICHARD Manx, orrnrnannttenra, PENNSYLVANIA.

nnv'rcn Eon comma-ware runnansor woven FABRICS. 1

Application. filed March 25, 1925. Serial No. 18,169.

This invention relates. to devices of the general character.disclosedin U. S. Patent Noj.;1,496,241, dated June, 3, 1924, and one object of the'present invention is to provide a device for cutting the weft threads of a \vovenfabric so constructed as practically to insure the; centering of the cutting elements, thereby affording apile of maximum thickness requiring little shearing.

Another object of theinvention is to pro-f vide a device .of the stated typeprovided with improvedadjust nent features facilitating replacement ofparts.

further objectof the invention is to provide a device. of .the stated character per;

mitting the useof morecutters to'the inch than heretoforehasbeen practicable;

Theinvention' also contemplates the provisionjofa novel cutting attachment for loomsemploying rotary cutters operating in. conjunction. withfixed guide elements as hereinafter described and as. clearly; illusg;

trated in the attached drawings, \inwhich:

Figures 1 2 are; respectively a side elevation and a lan view of an assembled attachment ma e in accordance with my invention; V

Fig. 3 is a section on the line 3-3, Fig. 1, and 2 r v I Figs. 4 and 5 are respectively a side elevation and a plan view of one of the cutter guide elements.

the cutting elements comprises a guide element 1, clearly illustrated in Figs. 4 and 5, consistingof a fiat plate of hooked formation having a slotted portion 2 at the top terminating at the forward end in an extended tongue 3 and shaped to provide a guide for a flat rotary disk cutter 4, as shown in Figs. 1 to 3, the said cutter projecting into the slot 5, as clearly illustrated.

As a support for the elements, I provide a beam 6 adapted for mounting transversely of the loom. As clearly illustrated, the beam 6 has in one longitudinal side av recess 7 terminating short of each end, and across this recess I secure supporting bars 8 and 9 and a third bar 10 secured in theflbottom of the recess inwardly of the said support ing bar 8. Thebar 8 is provided in its top with parallel longitudinal recesses 11 and 12 adapted for reception of a dependin lug 13 on each of the guide members 1. with the lug occupying one or other of the recesses 11 and 12, as shown in Fig. 3, and

with the tongue 3. extending inwardly across the recess 7 and over thetop of the bar 10, theiower hooked end of the members 1 ex tend inwardly under the said bar 8,3I1d retaining elements 14 in the form, for exam ple, of rubber bands connect the members with the bar 9, the. lower hooked ends of the members .1 being provided in. each instance with a suitable recess, 15 for the rubber bands. andthe bar 9' being provided in, the

present instance with suitable projecting, elements 16 around which the lower ends of.

the. connecting resilient bands extend. The hands 14, as willbe apparent, tend to re tain the elements 1 in their respective proper positions on the supporting structure, while at the same time providinga certain au iount of resiliency and free movement. of the said members .1 i

Asshown in Figs. .3 and. 5, the ends.

ofthe tongues 3 of the members 1 are prof. v

vided with :a perforation 17, for otfla guide ;:wire 18, see Fig. 3, whichupasses through one .ofthe heddlesof the plooinwto. which the cutter is attached.

Mounted at each end of the beam 6 is a reception bracket 21 constituting a support and guide for a slide 22 carryinga bearing for a, shaft 23 upon which the cutter disks 4 are mounted. Asillustrated, both the bracket 21 and the slide 22 are provided with atransverse I flange, 24 and 25 respectively, and the flange With reference to the drawings, each of 24 is provided, with an aperture for a bolt 26 which is threaded into the flange 25, thereby constituting means for adjusting the slide 22 vertically on the bracket. A second bolt 27 passes through a vertical slot 28 in the'upright portion of thebracket 21 and is threaded into the corresponding portion of the slide 22,the bolt 27 holding the slide 22 to the face of the bracket 21 and providing additional means for locking the slide in adjusted position to the bracket. Each slide 22 carries at its lower end a horizontal hearing 29 for the said shaft '23, and the cutter disks 4 are keyed to this shaft so as to rotate therewith, while maintaining freedom 7 inch, andin this-sense the device is a matement also permits the various guide elements l'to be moved outwardly to a position in which the lug 13 occupies the outer groove 12 and in this position the cutter disk tli'es clear of the slot 5. Obviously, the arrangement permits replacement of any one of the elements 1 without disturbing the normal cutting relation between the others of the cutters and the respective guide elements.

Under conditions of operation, the'cutter shaft 23is continuously rotated from any suitable source ofpower through the medium ofa pulley 30 at one end otthe shaft, and by means forming no part of the present inven tion, the successive change of weft threads of thenewly woven fabric isguided onto the tongues 3 of the elements 1 wlnch aspreviously noted: extend between the warp threads at any desired intervals. As the fabric is moved rearwardly, the weft threads are brought successively into contact with the edge of the. rotating cutter disks 4 and. are immediately severed thereby.

It is obvious by. reason of: the floatingnatureof-the elements 1 and of the cooperat I rial improvement over devices of like nature. I claim:

1. In acutter for use on pile fabric looms, I

the combination with a )lurality of rotary cutter elements mounted ment, of a floating guide tor' each of'said elenientsmovable with the latter.

2. In av cutter for pile fabric looms, thecombination with a shaft, of a plurality of rotary cutters splined to the shaft, and a plurality of floating guide elements each .45- cutter elements and'movable With said elehaving a slot for reception of one of the ments axially of said shaft.

.3. In a cutter for pile fabric looms, the" combination-with a. supporting I structurehavinga longitudinal groove, a plurality of guide elements having retaining portions eX- tending'in said groove, resilient means -tor retaining the guide elements in said groove,

and a plurality of rotary cutter elements 1 cooperative with the said guidesi at. Ina cutter for pile fabric-looms, the

combination witha supporting structurei having a longitudinal groove, of a-,.pluralityof slottedguide elements-having parts ex tending into said groove, resilient means for retaining the guide elements in position,- at

or free axial moveshaft paralleling said groove, and'aplurality of rotary cutter elementsfsplined to 1 said? shaft and adapted for operation in-tlijeyslots of said guide elements.

Brennan 

